Window for stoves.



W. R. JEAVONS.

WINDOW FOR STOVES.

APPLICATION FILED JUNE H. 1913.

130,789. Patented Dec. 19,1916.

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WILLIAM R. JEAVONS, 0F CLEVELAND, OHIO.

WINDOW non STOVES.

racemes.

To all whom it may concern:

Beit known thatI, WILLIAM R; JEAvoNs, a citizen of the United States'reSiding-at (lleveland, inthe county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Vindows. for Stoves, of which the, following is a 'full, clear, and eXact description, reference being had to the accompanying drawings. This invention relates to windows for stove drums .or similar inclosures for'burnersand particularly for the burners of oil stoves. As usually constructed, these Windows aremade of mica or similar transparent material, whereby an inspection of the burner and of the "flame is permitted, enabling the operator to adjust the wick-so as to secure the heightof flame that may be desirabl'e or necessary. The windows of this type are objectionable for the reasonthat they subject the eye ofthe observer to the bright white light of the flame, producing fatigue and strains injurious to-the eyesight. They are further objectionable for the reason that the micaor similar transparent material is not durable, being extremely liable to breakage and injury. It is the object of this invention to provide a window of. this character which Will not be liable=to breakage and injury under ordinary conditions of use, which will permitan inspection of the flame, and which will at the sametime serveto breakup the lightrays proceeding from the flame in such manner as ltopr'actically cut out therays which produce the undesirable strains upon the eye, while not interfering with the Specification of Letters Patent. Patented Dec, 19, 1916, Application fi led J'une 11, 1913. Serial No. 772,987. i

lVith the foregoing object and with other objects to be explained hereinafter in view, the invention may be defined generally as consisting of the combinations of elements embodied in the claims hereto annexed and illustrated in the drawings forming a part hereof, wherein Figure 1 illustrates front elevation of a portion of a stove and drum having my invention applied thereto; Fig. 2 a cross sectional detail through the window and a portion of the drum to which it is applied; and Fig. 3 a sectional view taken at right angles to Fig. 1.

Describing by reference characters the various parts illustrated herein, 1 denotes the drum base, 2 the drum, and 3 the hydrocarbon draft-burner of an oil heating stove, the aforementioned parts being of any approved construction. At a suitable height to permit of convenient inspection of the burner flame, an opening 4 is provided in the drum, said opening preferably being rectangular. This opening is shown as covered by a Wire gauzescreen 5, which is held to its seat across the opening by means of a sheet metal window frame consisting generally of a central countersunk reticulated backing for the gauze and an embossed outer rim whereby the frame may be supported and clamped in place.

6 denotes the central countersunk portion of the frame, such countersunk portion be ing preferably reticulated and having a relatively large area of perforations, whereby inspection of the flame is permitted. The frame is preferably of light sheet metal, and the portion 6 is countersunk so as to form substantially a continuation of the cylindrical surface 2 of the drum. The outer portion of this frame is pressed outwardly, being united with the centrally depressed portion bya shoulder 7, and the outer edges of the' outwardly pressed portion 8 are preferably beveled, as shown at 9, to present a neat appearance and to contact closely with the drum wall.

The wiregauze 5 is of such length and width as to cover the opening 4: and he clamped against the edges of the opening by the portion 6 of the frame. The outer edges of the gauze are bent outwardly, as shown at 5, whereby the gauze fits around the inwardly projecting portion (3 of the frame to be retained in place thereby. The frame is secured to the drum, as bymeans of short bolts 10, the heads whereof fit in countersunk recesses 11 in the frame, nuts 12 securing the bolts and the frame to the.

drum.

By the construction described, the wire gauze covering for the opening f is easily applied to the frame and the frame and gauze are conveniently and effectively secured in operative relation to each other and to the opening.

The'frame performs a two-fold function. Where wire gauze is employed as the f0"- raminous material, it serves as a backing for the same. The pattern with which it is provided serves the important function of increasingthe obstruction offered by the forarninous material to the passage of air theretlnough and thus enables me to pro vide the drum with a larger window opening than could otherwise be employed because of the. necessity of preserving the draft conditions within the drum substantially intact, while it does not prevent the observation of the flame contour.

I have found that, by using wire of about nine-thousandths inch gage for the gauze and by employing at least fifty of these wires to the linear inch, the disagreeable light rays are eliminated and a detrimental draft through the gauze above the burner flame is prevented. The most eflicient resuits are secured when, with wires of this gage, the number per linear inch is from fifty to sixty. Vith this arrangement, the area of perforation is about one fourth of the total area of the opening covered by the wire gauze while the openingsbetween the wires are sufficiently small to frictionally retard the flow of the air and thus prevent drafts entering the drum which will detrimentally affect the flame.

Having thus described my invention what I claim is l. The combination, with a cylindrical drum having a window opening, of a frame for said opening having a perforated or reticulated central portion covering the opening and having substantially the same radius of curvature as the drum, said frame having an outer or rim portion surrounding the opening and connected with the central portion by means of a ledge or shoulder, means extending through said rim and connecting the frame to the drum, and a wire gauze covering for the opening having its outer edges bent around said ledge or shoulder.

2. The combination, with a drum having a window opening in the wall thereof, of a sheet-metal frame having a depressed perforated central portion of greaterarea than said opening and an outwardly pressed rim portion surrounding the central portion and connectedthereto by a ledge or shoulder, said rim portion having its outer edges bent toward the drum to contact therewith,

a wire gauze covering for said opening, said covering havingits edges flanged outwardly around the said ledge or shoulder of the frame, and means for securing the frame to the drum. V V n 4 3. The combination, with a drum having a hydrocarbon draft burner therein and a window opening for observing the burner flame, of a foraminous covering for said opening, the openings in said covering frictionally retarding the passage of air therethrough, and a pattern cobperating with the covering to increase the obstruction offered by the openings therein to the passage of air therethrough, the openings permitting the observation of the flame contour and being sufliciently small to materially limit the passage of light rays therethrough and to substantially maintain intact the draft conditions within said drum.

4. The combination, with a drum having a hydrocarbon draft burner therein and a window opening for observing the burner flame, of a wire gauze covering for said opening, the meshes in said covering frictionally retarding the passageofair therethrough, and a backing frame for the gauze having a pattern for cooperating with the gauze to' increase the obstruction offered thereby to the passage of air therethrough, the meshes in said gauze permitting the observation of the flamecontou'r and being sufficiently small to materially limit the passage of light rays therethrough and to substantially maintain intact the draft conditions in said drum. I

5. The combination, with a drum having a hydrocarbon draft burner therein and a window opening for observing the flame of said burner, of a foraminous covering for said opening, the openings in said covering permitting the observationof the flame contour and being suflic'iently small to materially'limit the passage of light rays therethrough" and to maintain substantially intact thedesired draft conditions within said drum, the area of perforation being approximately one-fourth the area of the covls.- Y r 6. The combinatiomwith a drum having a hydrocarbon draft burner therein and a window opening for observing the burner flame, of a wire gauzecovering for said opening, the wires of said gauze being substantially n ne one-thouis'an hs Tof an'inch' iii) In testimony whereof, I hereunto affix my signature in the presence of two Witnesses.

WILLIAM R. JEAVONS.

Witnesses:

BRENNAN B. \VEs'r, HAROLD E. SMITH.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. G. 

